05000302/LER-1978-005-03, /03L-0:on 780109,one Sump Pump Failed to Start During Cable Tunnel Sump Pump Operability Test SP-322 Performance.Caused by Failure of Start Control Bulb Switch Due to Inadequate Current Capacity

/03L-0:on 780109,one Sump Pump Failed to Start During Cable Tunnel Sump Pump Operability Test SP-322 Performance.Caused by Failure of Start Control Bulb Switch Due to Inadequate Current Capacity

ML19308D183
Person / Time
Site:	Crystal River
Issue date:	02/02/1978
From:	Cooper J FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19308D179	List: 05000302/LER-1978-005, Forwards LER 78-005/03L-0 05000302/LER-1978-005-03, /03L-0:on 780109,one Sump Pump Failed to Start During Cable Tunnel Sump Pump Operability Test SP-322 Performance.Caused by Failure of Start Control Bulb Switch Due to Inadequate Current Capacity
References
LER-78-005-03L, LER-78-5-3L, NUDOCS 8002270651
Download: ML19308D183 (2)

LER-1978-005, /03L-0:on 780109,one Sump Pump Failed to Start During Cable Tunnel Sump Pump Operability Test SP-322 Performance.Caused by Failure of Start Control Bulb Switch Due to Inadequate Current Capacity

Event date:
Report date:
3021978005R03 - NRC Website

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CAUSE DESCMif f1 cps AND CORRICflVE ACTIONS

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1.

Repor No.:

50-302/78-005/03L-0 2.

Facility:

CrystalRiverdnit #3 3.

Raport Date:

2 February 1978 4.

Occurrence Date:

9 January 1978 5.

Identification of occurrence:

Failure of one cable tunnel pump sump to start creating a condition contrary to Technical Specification 3.8.1.1.a.

6.

Conditions Prior to Occurrence:

Mode 1 operation.

7.

Description of Occurrence:

i At 0001, the Units 1 & 2 Shift Supervisor notified Unit 3 that when performing the Cable Tunnel Sump Pros Operability Surveillance Procedurs SP-322, one of the two sump pumps failed c: start. The one hour Action Statement of Technical Specification 3.8.1.1. was entered md both emergency diesel generators were verified operable and the Breaker Verificacica, SP-321, was performed. Units 1 & 2 maintenance restored operability of the sump pump at 0640 and SP-322 was complaced satisfactorily.

Designation of Apparent Cause:

The current capacity of the start control bulb switch for the pump installed en 4 January 1978 was inadequate, the switch failed rendering the pump inoperable.

9.

Analysis of Occurrence:

There was no safety hazard to the plant or general public as both "3A" and "33" emergency diesel generators were available and verified operable.

10.

Corrective Action

No corrective serion necessary as installation of a start control bulb switch of adequate current capacity restored operability of the pump.

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Failure Data:

This is the second occurrence of this event as reported by LER 78-002/03L-0.

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